I've started chopping a Jesse James West Coast Choppers bike to mount an engine on it. I'm going to have to relocate the bottom bracket to the front of downtube and offset and inch or so to the to the driveside for my drive side jackshaft conversion. Engine will fit nicely between my crankset. Will have disc hubs laced onto original rims for front and rear disc conversion, have decided to use 4X pattern with black DT swiss spokes for original look. I'll take pictures along the way, along with the gas tank modification. Here is what I've done so far in the pics. I made an engine mount that will bolt onto an engine mount plate that is welded onto the down tube and seat tube. New seat tube will be notched and welded where I cut out old one. New bottom bracket, pillow block mounting plate(for drive side conversion), and front and rear disc tabs will be welded on. I'm going to internally route the brake lines and engine control lines for a clean look. Masking tape is on the last picture to serve as guides for my cutting and measuring. Mock up shows shows an engine position that i thought of, but i'll probably use the configuration that I've messed around with in photoshop.
Last edited by a moderator: